Advancing direct ethanol fuel cell operation at intermediate temperature by combining Nafion-hybrid electrolyte and well-alloyed PtSn/C electrocatalyst

Autor(es)

Dresch, Mauro Andre ^{[1, 2]} ; Matos, Bruno Ribeiro ^[1] ; Martins Godoi, Denis Ricardo ^[3] ; Linardi, Marcelo ^[1] ; Fonseca, Fabio Coral ^[1] ; Mercedes Villullas, Hebe de las ^[3] ; Santiago, Elisabete Inacio ^[1]

Afiliação do(s) autor(es)

^[1] IPEN CNEN SP, Inst Pesquisas Energet & Nucl, Av Prof Lineu Prestes 2242, BR-05508000 Sao Paulo, SP - Brazil

^[2] Univ Fed Mato Grosso UFMT, Inst Ciencias Nat Humanas & Sociais, Av Alexandre Ferronato 1200, BR-78550728 Sinop, MT - Brazil

^[3] Univ Estadual Paulista, Inst Quim, UNESP, Rua Prof Francisco Degni 55, BR-14800060 Araraquara, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY; v. 46, n. 24, p. 13252-13264, APR 6 2021.
• Citações Web of Science: 1

Resumo

The advancement of direct ethanol fuel cell (DEFC) represents a real challenge to electrochemical science because ethanol changes significantly the triple phase boundary properties such as the redox reactions and the proton transport. Ethanol molecules promote poor fuel cell performance due to their slow oxidation rate, reduction of the proton transport due to high affinity of ethanol by the membrane, and due to mixed potential when the ethanol molecules reach the cathode by crossover. DEFC performance has been improved by advances in the membranes, e.g., low ethanol crossover polymer composites, or electrode materials, e.g., binary/ternary catalysts. Herein, high temperature (130 degrees C) DEFC tests were systematically investigated by using optimized electrode and electrolyte materials: Nafion-SiO2 hybrid electrolyte and well-alloyed PtSn/C electrocatalyst. By optimizing both the electrode and the electrolyte in conjunction, DEFCs operating at 130 degrees C exhibited a threefold increase on performance as compared to standard commercially available materials. (C) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 14/12255-6 - Relações catálise-nanoestrutura-propriedades e estudos dos mecanismos de reação: estabelecendo bases para o desenho de catalisadores multifuncionais
• Beneficiário: Hebe de las Mercedes Villullas
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 14/09087-4 - Estudos sobre o uso do bioetanol em células a combustível do tipo PEMFC e SOFC
• Beneficiário: Marcelo Linardi
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 17/11937-4 - Rota sustentável para a conversão de metano com tecnologias eletroquímicas avançadas
• Beneficiário: Fabio Coral Fonseca
• Modalidade de apoio: Auxílio à Pesquisa - Programa Centros de Pesquisa em Engenharia
• Processo FAPESP: 14/50279-4 - Brasil Research Centre for Gas Innovation
• Beneficiário: Julio Romano Meneghini
• Modalidade de apoio: Auxílio à Pesquisa - Programa Centros de Pesquisa em Engenharia